T/FQIA 004-2022 Determination of Residual Amounts of Matrine and Diphan in Tea by Liquid Chromatography-Tandem Mass Spectrometry

Scope

Scope: Scope This document specifies the liquid chromatography-tandem mass spectrometry method for the determination of residues of Methomyl and Chlorpyrifos in tea. This document is applicable to the determination of residues of Methomyl and Chlorpyrifos in green tea, black tea, white tea, and oolong tea. Other types of tea can be referenced for implementation. Main technical content: 1. Scope This document specifies the liquid chromatography-tandem mass spectrometry method for the determination of residues of Methomyl and Chlorpyrifos in tea. This document is applicable to the determination of residues of Methomyl and Chlorpyrifos in green tea, black tea, white tea, and oolong tea. Other types of tea can be referenced for implementation. 2. Normative references The content of the following documents is an integral part of this document through normative references. Among them, the referenced documents with a date are only applicable to the version corresponding to that date; the latest version (including all amendment sheets) of the unreferenced documents is applicable to this document. GB/T 6682  Specifications and test methods for water used in analytical laboratories GB/T 8303  Preparation of crushed tea samples and determination of their dry matter content 3. Terms and definitions This document does not define any terms or definitions. 4. Principle Tea samples are extracted with water, and the extract is purified by solid-phase extraction before being detected by liquid chromatography-tandem mass spectrometry using the external standard method. Main content Preface II.1 Scope 12 Normative references 13 Terms and definitions 14 Principle 15 Reagents and materials 15.1 Reagents 15.2 Solution preparation 15.3 Standard samples 25.4 Standard solution preparation 25.5 Materials 26 Instruments and equipment 27 Sample preparation and storage

Development Information

Related Standards